Yarn diverting apparatus



1967 H. L. CLEMENT YARN DIVERTING APPARATUS Filed March 24, 1965 2 SheetsSheet l 1957 H. CLEMENT YARN DIVERTING APPARATUS 2 Sheets-Sheet 2 Filed March 24, 1965 United States Patent 3,305,910 YARN DIVERTIN G APPARATUS Herbert Lee Clement, Salisbury, Md., assignor to E. I. du Pont de Nemours and Company, Wilmington, DeL, a corporation of Delaware Filed Mar. 24, 1965, Ser. No. 442,400 5 Claims. (Cl. 281) This invention relates generally to the production of bulked filamentary yarn and more particularly to improvements in a bulking apparatus which includes a jet device through which the yarn advances to a moving foraminous surface.

In the operation of such an apparatus, because of the high noise level associated with the fluid stream passing through the jet orifice, various remedies such as earplugs and acoustical enclosures have been adopted. Even with an acoustical enclosure, earplugs are still required when the enclosure is opened for threadline stringup since the jet must be turned on to assist in overcoming frictional drag on yarn contact surfaces. With the jet turned off, an effective stringup cannot be made through the normal threadline path of advance along the foraminous surface.

The most important object of this invention is to eliminate the need for operation of the fluid jet during stringup of an apparatus used for producing bulked yarns. A more particular objective is to provide a movable guide for diverting a threadline from its normal path of advance through the apparatus enclosure and a remote control for releasing it after the jet has been placed in operation. A further objective is to reduce frictional drag on the yarn during stringup of a yarn bulking position.

These objectives have been achieved with an apparatus located in an acoustical enclosure and including a driven drum having a foraminous surface around which filamentary yarn normally advances from a jet to a station ary guide and an auxiliary guide means for diverting the yarn from that surface during stringup. As components, the auxiliary guide means is comprised of a fixed support, an arm having a freely rotatable roll projecting from one of its ends, a pivot pin mounting the arm on the support for swinging movement of the roll to and from a normal position of spaced parallelism with the drum surface and an actuator pin in contact with the arm adjacent its other end for swinging the roll to a tilted, yamreleasing position.

Other objectives and advantages will be apparent from the following specification wherein reference is made to the accompanying drawings in which:

FIGURE 1 is a front perspective view of a bulking apparatus into which the improvements of our invention have been incorporated; and

FIGS. 2, 3' are side and front elevations, respectively, of the swingable auxiliary guide shown in FIG. 1.

In the embodiment chosen for purposes of illustration, filamentary yarn from a supply bobbin 12 is passed around a pair of metering rolls 14. After opening a door 16 on enclosure 18, yarn 10 is introduced through slot 20 and is passed through jet 22 over a freely rotatable roll 24, to prevent contact with the foraminous surface of a driven drum 26 during the stringup operation. In FIGS. 1, 2, that surface has been shown as a screen. Jet 22 is mounted on a pedestal which extends from a side wall 28 of enclosure 18 and normally receives air under pressure from a source connected to an inlet conduit 30.

3,305,91 Patented Feb. 28, 19

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While door 16 is open, operator exposure to high n levels is avoided by first turning off the air supply. Fr roll 24, the yarn is routed around a stationary guide and through slot 34 to a second pair of metering rolls Thus, the high frictional drag encountered by yarn 1( its normal path of advance 38 around the foraminous 5 face of drum 26 is avoided by diverting it to roll These stringup steps are accomplished manually witI sucker gun or other available stringup aids (not show Following stringup, door 16 is closed, jet 22 is turned and yarn 10 is released to drum 26 by depressing a pin which tilts roll 24 downwardly.

Referring to FIGS. 2, 3, roll 24 is freely rotatable o shaft 42 which projects from one end of an arm 44 a cantilever. At a point between its ends, arm 44 is tached to the depending leg of a fixed support 46 means of a pivot pin 48 having its axis substantially p pendicular to that of drum 26. Adjacent its other e arm 44 has a flat surface 50 adapted for bearing enga ment with the horizontal leg of support 46 which is i tened to top Wall 52 of enclosure 18 by screws 54. Att time, roll 24 is in spaced parallelism with the surface drum 26. Top wall 52 and support 46 are provided w aligned openings through which actuator pin 40 exten Pin 40 contacts and rests on surface 50. The tension yarn 10 pulls on roll 24 and thus tends to hold surf; 50 in bearing engagement with support 46. When pin is depressed, arm 44 is pivoted in a counterclockwise rection (FIG. 2) and roll 24 is tilted downwardly, tl releasing yarn 10 to its normal path of advance 38 tween jet 22 and stationary guide 32.

Instead of a freely rotatable roll, the diverting gu could be a pin or stationary extension of arm 44. Otl changes and modifications of a similar nature will 0C1 to those skilled in the art Without departure from spirit of our invention which accordingly is intended to limited only by the scope of the appended claims.

Having thus described the invention, what is clain as new and desired to be secured by Letters Patent is:

1. In an apparatus including a driven drum having foraminous surface around which yarn normally advan between spaced elements, guide means for diverting yarn from said surface during stringup, said guide me: comprising: a fixed support; an arm; means mountf said arm, at a point between its ends, on said support swinging movement about an axis substantially perpl dicular to that of said drum, one of said ends be adapted for engagement with said support; a cylindri guide projecting from said arm adjacent its other e: said guide being in substantial parallelism with the (111 axis when the support is engaged by said one end of 1 arm; and an actuator associated with said arm for SWil ing said one end away from the support whereby to said guide downwardly out of parallelism with said (in axis and release the yarn to said surface.

2. The apparatus of claim 1 wherein said cylindri guide is a freely rotatable roll.

3. The apparatus of claim 1 wherein said actuator i pin extending through said support with one of its er contacting said one end of the arm.

4. In an apparatus including an enclosure defined walls and a door and, within said enclosure, a driven dn having a f-orrnainous surface around which yarn norma advances between a jet and a stationary guide, auxiliz guide means for diverting the yarn from said surface d stringup, said auxiliary guide means comprising: a port fixed to one of said walls, within the enclosure; an l having a cylindrical guide projecting from one Is ends; means mounting the arm on said support for nging movement of said cylindrical guide to and from iormal position in which it is in spaced parallelism h said surface; and an actuator pin extending through 1 one wall and contacting said arm adjacent its other whereby to swing the cylindrical guide downwardly of parallelism with said surface and release the yarn raid surface.

5. The apparatus of claim 4 wherein said cylindrical guide is a freely rotatable roll.

References Cited by the Examiner UNITED STATES PATENTS 3,143,784 8/1964 Scott 28-1 3,156,028 11/1964 Weiss et a1 28-72 3,166,822 1/1965 Starkie 281 MERVIN STEIN, Primary Examiner.

L. K. RIMRODT, Assistant Examiner. 

1. IN AN APPARATUS INCLUDING A DRIVEN DRUM HAVING A FORAMINOUS SURFACE AROUND WHICH YARN NORMALLY ADVANCES BETWEEN SPACED ELEMENTS, GUIDE MEANS FOR DIVERTING THE YARN FROM SAID SURFACE DURING STRINGUP, SAID GUIDE MEANS COMPRISING: A FIXED SUPPORT; AN ARM; MEANS MOUNTING SAID ARM, AT A POINT BETWEEN ITS ENDS, ON SAID SUPPORT FOR SWINGING MOVEMENT ABOUT AN AXIS SUBSTANTIALLY PERPENDICULAR TO THAT OF SAID DRUM, ONE OF SAID ENDS BEING ADAPTED FOR ENGAGEMENT WITH SAID SUPPORT; A CYLINDRICAL GUIDE PROJECTING FROM SAID ARM ADJACENT ITS OTHER END, SAID GUIDE BEING IN SUBSTANTIAL PARALLEISM WITH SAID DRUM AXIS WHEN THE SUPPORT IS ENGAGED BY SAID ONE OF THE ARM; AND AN ACTUATOR ASSOCIATED WITH SAID ARM FOR SWINGING SAID ONE END AWAY FROM THE SUPPORT WHEREBY TO TILT SAID GUIDE DOWNWARDLY OUT OF PARALLEISM WITH SAID DRUM AXIS AND RELEASE THE YARN TO SAID SURFACE. 